Killer Croc but it's literally just Gustave the Crocodile who found his way into the Gotham City sewers (Gotham City doesn't have animal control and it's up to Batman to stop him) :
Giant man-eating crocodile with 300 kills 'still out there and hunting next victim' - Daily Star
Gustave the Crocodile: The Giant Man-Eater From Burundi Who Has Eaten 300 People | Science Times
Which was the biggest crocodile ever found in human history, Gustave or Lolong? - Quora
Tyrant Is Terror — muchymozzarella: thecuckoohaslanded: ...
Gustave, the monsterous crocodile of Burundi, compared to other crocodiles : r/AbsoluteUnits
Gustave: The Killer Crocodile of Burundi - Nature’s Reality
Giant croc's killer still at large, $5000 bounty unclaimed
Giant Crocodile Said To Have Eaten 300 People: 'They Never Kill for Fun'
Massive crocodile which has 'eaten 300 people' is on the loose | indy100
What happened to Gustave the crocodile? - Quora
Professor John R. Hutchinson on X: "Time to eat! Gustave the Nile crocodile, estimated at 6 metres long and maybe a tonne. by Julian Guerrero from https://t.co/I0b3FyvyxJ More info: https://t.co/BpIWSmcuk4 (apparently we
Gustave, a Nile crocodile in Burundi that has evaded capture for decades, is rumored to have killed 300 people and is feared by locals in the region - iFunny Brazil
Gustave (crocodile) - Wikipedia
Man-eaters: Crocodile Gustave | DinoAnimals.com
Huge crocodile rumored to have eaten 300 people escapes capture in dramatic footage
Mystery surrounds fate of one-tonne crocodile which has 'eaten more than 300 people' | Daily Mail Online
Gustave: The legendary man-eater of Burundi by Paleonerd01 on DeviantArt
One man's bid to save Burundi's crocodiles from the cooking pot | Wildlife | The Guardian
BBC World Service - Programmes - Gustave - Burundi's killer crocodile